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SUMMARY:A Scaling Relation of “Little Red Dots” between Halpha and Bol
 ometric  Luminosities: Enhanced Halpha Emission Relative to Low-z Type 1 A
 GNs
DTSTART;VALUE=DATE-TIME:20260715T073500Z
DTEND;VALUE=DATE-TIME:20260715T075000Z
DTSTAMP;VALUE=DATE-TIME:20260720T010238Z
UID:indico-contribution-8982@indico.icrr.u-tokyo.ac.jp
DESCRIPTION:Speakers: Hiroto Yanagisawa ()\nWe investigate the spectroscop
 ic demography of “little red dots” (LRDs) using 37 objects at z~3–7 
 compiled from various JWST programs. We identifiy a tight scaling relation
  between Ha luminosity (L_Ha) and bolometric luminosity (L_bol)\, which is
  enhanced by a factor of ~40 in L _Ha relative to that of low-z type 1 AGN
 . We explore the physical origin of this enhancement based on the classic 
 locally optimally-emitting cloud (LOC) framework\, and find that it can be
  explained by an increase in the broad line region (BLR) covering factor f
 rom ~20% (Type 1 AGN) to ~100% (LRDs)\, together with an increase in the h
 ydrogen column density from N_H~10^23 cm−2 to >10^24 cm−2.\n\nhttps://
 indico.icrr.u-tokyo.ac.jp/event/1254/contributions/8982/
LOCATION:Kashiwa Large Seminar Room 601 (Kashiwa)
URL:https://indico.icrr.u-tokyo.ac.jp/event/1254/contributions/8982/
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